The guys responsible for Final Fantasy XI are working on a brand new MMO but have said that the next online game out of Square Enix may not be a Final Fantasy title.
In an interview from the FF FanFest, developers said that the game could be a continuation, a new game in the FF saga or a brand new IP but did not wish to give anything away as to which one it would actually be.
Whichever direction Square Enix’ new MMO takes, they have reinforced their reluctance to compete with major powerhouse titles like World of Warcraft and Lord of the Rings Online.
We feel that with a lot of MMORPGs on the market, players have the choice of the one they want to go to and they'll try them out and then they'll stick with one.